The server shelf is looking kind of empty with just two machines in it. Pre-virtualization there were five hosts - Bingo, Anna, Solstice and Wixer, with Beta sitting on top of an old Synoptics 3030 chassis in the rack to the right. Our pre-virtualization power draw was 450Watts. We're down to 335W; a savings of 115W. That's roughly ~$182 per year in electrical savings. Given the cost to build Imperium (a bit higher than I thought because of a couple of things I missed in the original estimate), that's a 7.5 year ROI. If, however, you take into account future upgrades avoided, the ROI is much shorter. ...And building things is always fun